Convert DataGridView ColumnType runtime

It is not possible to put a datagridviewtextboxcell in datagridviewcomboboxcolumn. What you can do is have a datagridviewcomboboxcell in a datagridviewtextboxcolumn.

Code Snippet

DataGridViewComboBoxCell cc = new DataGridViewComboBoxCell();
// you could set the combobox's datasource instead of adding items
cc.Items.Add("1");
cc.Items.Add("2");
cc.Items.Add("3");

dataGridView1[0,3]= cc;



You can do something like this:

Code Snippet

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void Form1_Load(object sender, EventArgs e)

{

DataTable dt = new DataTable("b");

dt.Columns.Add("col");

dt.Rows.Add("bb1");

dt.Rows.Add("bb2");

dt.Rows.Add("bb3");



this.dataGridView1.DataSource = dt;



DataGridViewComboBoxColumn cmb = new DataGridViewComboBoxColumn();

cmb.Items.Add("111");

cmb.Items.Add("222");

cmb.Items.Add("333");

this.dataGridView1.Columns.Add(cmb);

}

private void button1_Click(object sender, EventArgs e)

{

DataGridViewTextBoxCell cell = new DataGridViewTextBoxCell();

cell.Value = "bb1";

this.dataGridView1[1, 1] = cell;

}

}